support cgroup for limit resource

examples/limitcpu_test.go

@@ -0,0 +1,33 @@
+//+build linux
+
+package examples
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	ffmpeg "github.com/u2takey/ffmpeg-go"
+)
+
+func ComplexFilterExample(testInputFile, testOverlayFile, testOutputFile string) *ffmpeg.Stream {
+	split := ffmpeg.Input(testInputFile).VFlip().Split()
+	split0, split1 := split.Get("0"), split.Get("1")
+	overlayFile := ffmpeg.Input(testOverlayFile).Crop(10, 10, 158, 112)
+	return ffmpeg.Concat([]*ffmpeg.Stream{
+		split0.Trim(ffmpeg.KwArgs{"start_frame": 10, "end_frame": 20}),
+		split1.Trim(ffmpeg.KwArgs{"start_frame": 30, "end_frame": 40})}).
+		Overlay(overlayFile.HFlip(), "").
+		DrawBox(50, 50, 120, 120, "red", 5).
+		Output(testOutputFile).
+		OverWriteOutput()
+}
+
+// PID    USER       PR  NI    VIRT    RES    SHR S  %CPU   %MEM     TIME+ COMMAND
+// 1386105 root      20   0 2114152 273780  31672 R  50.2   1.7      0:16.79 ffmpeg
+func TestLimitCpu(t *testing.T) {
+	e := ComplexFilterExample("./sample_data/in1.mp4", "./sample_data/overlay.png", "./sample_data/out2.mp4")
+	err := e.WithCpuCoreRequest(0.1).WithCpuCoreLimit(0.5).RunLinux()
+	if err != nil {
+		assert.Nil(t, err)
+	}
+}